*{
  list-style: none;
  margin: 0;
  padding: 0;
  font-family: "微软雅黑";
}
.left{
  float: left;
}
.right{
  float: right;
}
.clear{
  clear: both;
}
.none{
  display: none;
}
a:hover{
  text-decoration: none;
}
img{
  display: block;
}
input{outline: none;}

::-webkit-scrollbar {
  width: 20px;
  height: 20px;
}

::-webkit-scrollbar-track,
::-webkit-scrollbar-thumb {
  border-radius: 999px;
  border: 5px solid transparent;
}

::-webkit-scrollbar-track {
  box-shadow: 1px 1px 5px rgba(0,0,0,.2) inset;
}

::-webkit-scrollbar-thumb {
  min-height: 20px;
  background-clip: content-box;
  box-shadow: 0 0 0 5px rgba(0,0,0,.2) inset;
}

::-webkit-scrollbar-corner {
  background: transparent;
}

.none{
  display: none;
}
